CN105863540A - Releasing sub assembly - Google Patents
Releasing sub assembly Download PDFInfo
- Publication number
- CN105863540A CN105863540A CN201610224248.5A CN201610224248A CN105863540A CN 105863540 A CN105863540 A CN 105863540A CN 201610224248 A CN201610224248 A CN 201610224248A CN 105863540 A CN105863540 A CN 105863540A
- Authority
- CN
- China
- Prior art keywords
- hydraulic cylinder
- mandrel
- piston
- releasing
- lower portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
Abstract
The invention relates to a releasing sub assembly. By adopting the releasing sub assembly, the problem that the three procedures of channel finding, fracture pinning and releasing cannot be realized simultaneously by using existing tools through one-time tubular column construction is mainly solved. The releasing sub assembly is characterized in that the inner side of the lower portion of an upper connector (1) is connected with a mandrel (2); the outer side of the lower portion of the upper connector (1) is connected with a hydraulic cylinder I (3); the lower portion of the hydraulic cylinder I (3) is connected with a hydraulic cylinder II (5); a piston I (4) is arranged in a cavity formed by the upper connector (1), the hydraulic cylinder I (3) and the mandrel (2); the lower portion of the inner side of the hydraulic cylinder II (5) makes contact with the mandrel (2); a piston II (6) is arranged in a cavity formed by the hydraulic cylinder I (3), the mandrel (2) and the hydraulic cylinder II (5); the lower portion of the hydraulic cylinder II (5) is connected with a releasing sub (9) through a connector (7); and a drill pipe (10) is welded to the lower portion of the releasing sub (9). By adopting the releasing sub assembly, channel finding and releasing work can be completed at a time, a fracture can be pinned, and accordingly a guarantee is provided for next-step construction.
Description
Technical field
The present invention relates to oilfield, a kind of back-off sub assembly.
Background technology
At present on oil field, back-off sub, look for passage nib instrument all to have giving up and look for passage single technology accordingly, but do not find to be provided simultaneously with looking for passage, pinning bad break mouth and the instrument of three functions of giving up.Therefore, existing instrument can not one-trip string construction realize looking for passage, pinning bad break mouth, three operations of giving up simultaneously, causes needing repeatedly lower tubular column during job execution, loses time, inefficiency.
Summary of the invention
In order to overcome existing instrument one-trip string construction not realize looking for passage, pinning bad break mouth, the deficiency of three operations of giving up simultaneously, the present invention provides a kind of back-off sub assembly, this back-off sub component set looks for passage, work of giving up once to complete, realization pins bad break mouth, provides guarantee for once walking construction.
The technical scheme is that a kind of back-off sub assembly, including top connection, welding drilling rod, top connection lower inside connects mandrel, outside connects hydraulic cylinder I, hydraulic cylinder I bottom connects hydraulic cylinder II, wherein hydraulic cylinder I lower inside contacts with mandrel, and the cavity that described top connection, hydraulic cylinder I, mandrel are formed is built-in with piston I；Described hydraulic cylinder II lower inside contacts with mandrel, and the cavity that hydraulic cylinder I, mandrel, hydraulic cylinder II are formed is built-in with piston II；Described hydraulic cylinder II bottom is connected to have between back-off sub, and back-off sub with mandrel by joint and is connected by shear pin, back-off sub bottom connecting welding drilling rod.
There is advantages that owing to taking such scheme, when instrument is down to bad break position, welding drilling rod front end intert downwards by different azimuth, determine fracture interface position, under enter drilling tool force upper and lower fracture be connected.Top connection lower inside connecting mandrel, top connection lower outside is sequentially connected with hydraulic cylinder I, hydraulic cylinder II, so form two cavitys, and it is equipped with piston I, piston II in cavity respectively, so, when starting pump, liquid enters two cavitys, compression piston I, piston II band moving mandrel are up, thus cut off shear pin, and upper lifting pipe post can complete to leave spike behind.Therefore, this tool set looks for passage, work of giving up once to complete, it is achieved pin bad break mouth, provides guarantee for once walking construction.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
1-top connection in figure, 2-mandrel, 3-hydraulic cylinder I, 4-piston I, 5-hydraulic cylinder II, 6-piston II, 7-joint, 8-shear pin, 9-back-off sub, 10-welds drilling rod, the upper liquid pass hole of 21-, liquid pass hole in 22-, liquid pass hole under 23-, 31-through hole A, 51-through hole B, 71-through hole C.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings:
As shown in Figure 1, a kind of back-off sub assembly, including top connection 1, welding drilling rod 10, top connection 1 lower inside connects mandrel 2, mandrel 2 epimere sidewall has between transitional pore 21, and top connection 1 and mandrel 2 and is provided with sealing ring, meanwhile, top connection 1 inner wall lower circumference is fluted.Being provided with boss outside top connection 1, boss lower thread connects hydraulic cylinder I 3, and hydraulic cylinder I 3 sidewall has through hole A31.Hydraulic cylinder I 3 lower inside contacts with mandrel 2, and contact surface is provided with sealing ring, so, a cavity is formed between top connection 1, mandrel 2, hydraulic cylinder I 3 three, cavity is built-in with piston I 4, piston I 4 is threadeded with mandrel 2, and top projection can be inserted in the groove bottom top connection 1.
Hydraulic cylinder I 3 lower inner wall contacts with mandrel 2, and the two contact surface bottom has a circle groove, mandrel 2 stage casing to have liquid pass hole B22.Hydraulic cylinder I 3 lower outside connects hydraulic cylinder II 5, and described hydraulic cylinder II 5 lower inside contacts with mandrel 2, and contact surface is provided with sealing ring.So, forming a cavity between hydraulic cylinder I 3, mandrel 2, hydraulic cylinder II 5 three, cavity is built-in with piston II 6, and piston II 6 is threadeded with mandrel 2, and piston II 6 top projection can be inserted in the groove of hydraulic cylinder I 3 bottom.
Described hydraulic cylinder II 5 lower outside thread connecting joint 7, having through hole 71 on joint 7, connecting bottom joint 7 has back-off sub 9, back-off sub 9 epimere inwall to contact with mandrel 2, and mandrel 2 hypomere is had between liquid pass hole C23, and back-off sub 9 with mandrel 2 and is connected by shear pin 8.Described back-off sub 9 bottom connecting welding drilling rod 10.
During work, first fastening means lower tubular column, when instrument is down to bad break position, utilizes welding drilling rod 10 front end to intert downwards by different azimuth, determine fracture interface position, under enter drilling tool and force upper and lower fracture to be connected, spike completes.Then starting pump, it is internal that liquid enters mandrel 2 by top connection 1, and respectively enters two cavitys by the upper liquid pass hole 21 on mandrel 2 and middle liquid pass hole 22, promotes piston I 4 and piston II 6 to move upward, and piston I 4 and piston II 6 band moving mandrel 2 are up simultaneously.Can be cut off by shear pin 8 when pump pressure reaches 10-12Mpa, liquid flows out from through hole C71, and now upper lifting pipe post can complete to leave spike behind.
Claims (1)
1. a back-off sub assembly, including top connection (1), welding drilling rod (10), it is characterized in that: top connection (1) lower inside connects mandrel (2), outside connects hydraulic cylinder I (3), hydraulic cylinder I (3) bottom connects hydraulic cylinder II (5), wherein hydraulic cylinder I (3) lower inside contacts with mandrel (2), and the cavity that described top connection (1), hydraulic cylinder I (3), mandrel (2) are formed is built-in with piston I (4)；Described hydraulic cylinder II (5) lower inside contacts with mandrel (2), and the cavity that hydraulic cylinder I (3), mandrel (2), hydraulic cylinder II (5) are formed is built-in with piston II (6)；Described hydraulic cylinder II (5) bottom is connected by joint (7) to have between back-off sub (9), and back-off sub (9) with mandrel (2) and is connected by shear pin (8), back-off sub (9) bottom connecting welding drilling rod (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610224248.5A CN105863540B (en) | 2016-04-12 | 2016-04-12 | Back-off sub component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610224248.5A CN105863540B (en) | 2016-04-12 | 2016-04-12 | Back-off sub component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105863540A true CN105863540A (en) | 2016-08-17 |
| CN105863540B CN105863540B (en) | 2018-06-26 |
Family
ID=56636732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610224248.5A Active CN105863540B (en) | 2016-04-12 | 2016-04-12 | Back-off sub component |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105863540B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2545353Y (en) * | 2002-05-10 | 2003-04-16 | 大庆油田有限责任公司 | Sand control joint |
| US6557631B1 (en) * | 1999-10-30 | 2003-05-06 | Reeves Wireline Technologies, Ltd. | Down hole tension/compression device for logging tools |
| CN200961455Y (en) * | 2006-10-17 | 2007-10-17 | 新疆石油管理局井下作业公司 | Centralising device for casing shear |
| CN202108439U (en) * | 2011-05-13 | 2012-01-11 | 中国石油天然气股份有限公司 | Releasing tool |
| CN103277061A (en) * | 2013-05-17 | 2013-09-04 | 四机赛瓦石油钻采设备有限公司 | Hydraulic setting tool |
-
2016
- 2016-04-12 CN CN201610224248.5A patent/CN105863540B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6557631B1 (en) * | 1999-10-30 | 2003-05-06 | Reeves Wireline Technologies, Ltd. | Down hole tension/compression device for logging tools |
| CN2545353Y (en) * | 2002-05-10 | 2003-04-16 | 大庆油田有限责任公司 | Sand control joint |
| CN200961455Y (en) * | 2006-10-17 | 2007-10-17 | 新疆石油管理局井下作业公司 | Centralising device for casing shear |
| CN202108439U (en) * | 2011-05-13 | 2012-01-11 | 中国石油天然气股份有限公司 | Releasing tool |
| CN103277061A (en) * | 2013-05-17 | 2013-09-04 | 四机赛瓦石油钻采设备有限公司 | Hydraulic setting tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105863540B (en) | 2018-06-26 |
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